1.6-MHz Synchronous Switched-Mode Charger
with 4-A Integrated N-MOSFETs
Up to 94% Efficiency
30-V Input Rating with Adjustable Overvoltage
Protection
4.5-V to 17-V Input Operating Voltage Range
Battery Charge Voltage
bq24170: 1-, 2-, or 3-Cell with 4.2 V/Cell
BQ24172: Adjustable Charge Voltage
High Integration
Automatic Power Path Selector Between
Adapter and Battery
Dynamic Power Management
Integrated 20-V Switching MOSFETs
Integrated Bootstrap Diode
Internal Digital Soft Start
Safety
Thermal Regulation Loop Throttles Back
Current to Limit TJ= 120°C
Thermal Shutdown
Battery Thermistor Sense Hot/Cold Charge
Suspend and Battery Detect
Adjustable Input Overvoltage Protection
Cycle-by-Cycle Current Limit
Accuracy
±0.5% Charge Voltage Regulation
±4% Charge Current Regulation
±4% Input Current Regulation
<15-μA Battery Current With Adapter Removed
<1.5-mA Input Current With Adapter Present and
Charge Disabled
